Final answer:
The technique that originated in the realist era is the use of dialect in speech.
Step-by-step explanation:
The technique that originated in the realist era is the use of dialect in speech. Realism in literature focused on depicting everyday life and ordinary people, and using dialect in speech was a way to accurately portray the language and culture of different social classes. Writers like Mark Twain and William Dean Howells incorporated dialect in their works to create authentic and relatable characters.